Equating and interpreting PPFD table when using TWO exact same led lights

[Mugwort]

I am using to ViparSpectra XS 2000 LED lights in my 4‘ x 4‘ tent. Can someone in the know advise me about using these two lights together? How does one relate the PPFD table for one light to using two? With the exception of the two tall colors that are on the outside of the lights my canopy is roughly 30 inches.

 

[Mugwort]

colors = colas

 

[PrimoClonesCanada]

You have anything to measure?
Should use same ppfd it's just your probably going to reach it with lights higher in your tent would be my guess.

But you have to measure your ppfd to figure out where to put your lights if you want to have your plants at a certain ppfd level.
Those ppfd plans that come with a light aren't always super accurate if that's what your going by.
I use pulse pro but you can just get the photon app for your phone to give you a general idea, not the most accurate but at least give you an idea.

 

[Mugwort]

You have anything to measure?
Should use same ppfd it's just your probably going to reach it with lights higher in your tent would be my guess.

But you have to measure your ppfd to figure out where to put your lights if you want to have your plants at a certain ppfd level.
Those ppfd plans that come with a light aren't always super accurate if that's what your going by.
I use pulse pro but you can just get the photon app for your phone to give you a general idea, not the most accurate but at least give you an idea.

Thanks…been looking for an exact answer assuming that the provided map in the manual is correct. Looks like the only way I’m gonna get it is to buy a light meter . It just seems to me that if you have two of the same light you would have double the photons…not double but you would definitely have overlapping fields from both lamps. It seems like this should be able to be easily quantitated by someone who is familiar with lighting (wish I knew Dr Bisbee).

 

[PrimoClonesCanada]

Thanks…been looking for an exact answer assuming that the provided map in the manual is correct. Looks like the only way I’m gonna get it is to buy a light meter . It just seems to me that if you have two of the same light you would have double the photons…not double but you would definitely have overlapping fields from both lamps. It seems like this should be able to be easily quantitated by someone who is familiar with lighting (wish I knew Dr Bisbee).

If you don't feel like shelling out a few hundred and you have a smart phone try the photon app, like I said it's not the most accurate reading your going to get but it will give you a good idea of where you're at. O think I saw one grower post he saw around 100 ppfd difference between photon and pulse pro when tested together if I remember correctly

 

[growsince79]

Thanks…been looking for an exact answer assuming that the provided map in the manual is correct. Looks like the only way I’m gonna get it is to buy a light meter . It just seems to me that if you have two of the same light you would have double the photons…not double but you would definitely have overlapping fields from both lamps. It seems like this should be able to be easily quantitated by someone who is familiar with lighting (wish I knew Dr Bisbee).

I'd put as big of gap as you can between them.

 

[steamroller]

You don't double I think ?
I would think you just widened the highest par in the middle [ between the two lights] .
The par charts always show fade towards edges ,but with two lights next to each other the fade is moved to outside edges of both lamps.
The area that would be edge but is now middle should be yielding middle of light [ highest ] par levels ..
Just me without a meter ! I have used photone, I let my plants tell me and try not to turn lights up over 80% to help them last and perform properly over time .